Flora of North America species comparison

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Diplacus nanus

Diplacus thompsonii

dwarf monkey flower, dwarf purple monkey-flower, purple monkeyflower

Thompson's monkeyflower
Habit Herbs, annual. Herbs, annual, herbage usually drying dark.
Stems

erect, 30–120 mm, minutely glandular-puberulent.

erect, 30–150 mm, nodes 3–6, internodes 1–6 mm, glandular-puberulent.
Leaves

basal and cauline, relatively even-sized;

petiole absent;

blade narrowly elliptic to oblanceolate, ovate, obovate, or elliptic-lanceolate, (1–)3–30(–50) × (0.4–)0.7–8(–20) mm, margins entire, plane, apex rounded or obtuse, surfaces minutely glandular-puberulent.

usually cauline, relatively even-sized;

petiole absent, proximal base narrowed to petiole-like extension;

blade lanceolate or narrowly lanceolate to elliptic-lanceolate, 7–30 × 2–7 mm, margins entire, plane, apex acute, surfaces glandular-puberulent.
Pedicels

1–3 mm in fruit.

1–3 mm in fruit.
Flowers

2 per node, or 1 or 2 per node on 1 plant, chasmogamous.

2 per node, or 1 or 2 per node on 1 plant, chasmogamous.
Styles

glandular-puberulent or glandular-pubescent.

puberulent.
Corollas

magenta to purplish, dark line often extending onto each abaxial lip lobe from throat, palate ridges yellow with red-purple speckling and border, throat floor villous with hairs extending onto abaxial lip, tube 1.1–1.9 mm diam. at filament insertion, tube-throat 11–15 mm, limb 8–14 mm diam., usually, rarely not, bilabiate.

dark magenta to red-purple, throat floor yellowish and red-dotted, with a red-purple midvein radiating onto base of each lobe of proximal lip, palate ridges yellow, tube-throat 10–14 mm, limb 6–10 mm diam., not bilabiate.
Calyces

symmetrically attached to pedicels, not inflated in fruit, 6–9 mm, minutely glandular-puberulent, lobes subequal, apex acute-apiculate, acuminate, or attenuate, ribs dark green or reddish, intercostal areas whitish.

symmetrically attached to pedicels, inflated in fruit, 7–9 mm, glandular-villous, tube strongly plicate, lobes narrowly triangular, subequal, apex acuminate to attenuate, ribs broad, darkened, blackish, thickened, strongly raised, intercostal areas whitish, membranous.
Capsules

8–12 mm.

7–9 mm.
Anthers

included or exserted, ciliate.

included, ciliate.
Stigmas

exserted, lobes equal.

included, lobes subequal.
2n

= 16.

= 16.

Diplacus nanus

Diplacus thompsonii
Phenology Flowering (Apr–)May–Jul. Flowering May–Jul.
Habitat Openings in sagebrush, disturbed slopes, granite outcrops. Granitic soils and sands, sandy loam, outwash slopes, dry sagebrush flats, pinyon and Jeffrey pine woodlands.
Elevation (300–)1100–2300(–2900) m. [(1000–)3600–7500(–9500) ft.] 1800–2600(–3000) m. [5900–8500(–9800) ft.]
Distribution
from FNA
CA; ID; MT; NV; OR; WA; WY
[WildflowerSearch map]
from FNA
CA
[BONAP county map]
Discussion

Diplacus nanus is broadly distributed through northern California, southern Idaho, and eastern Oregon, with stations in Ravalli County, Montana, and Park County, Wyoming, and scattered localities in Washington.

Diplacus nanus is generally recognized by its strongly bilabiate corollas with purplish (not yellow) tubes and two dark purple patches along the sides of the throats. The glandular-puberulent vestiture of D. nanus contrasts with the glandular-pubescent and viscid-villous vestiture (with hairs much longer) of D. mephiticus.

W. L. Ezell (1971) noted that in the Siskiyou Mountains of Josephine County, Oregon, and adjacent Siskiyou and Trinity counties, California, corollas of Diplacus nanus do not have clearly differentiated abaxial and adaxial lips.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Diplacus thompsonii is abundant along the eastern side of the Sierra Nevada in Inyo and southern Mono counties. D. M. Thompson (2005) identified these populations as intermediate between Mimulus nanus var. mephiticus and M. bigelovii; diagnostic features are more similar to those of the latter, especially the inflated and strongly wing-angled calyx and the non-bilabiate corollas. The range of D. thompsonii is within the northern limit of D. bigelovii var. cuspidatus, which is different in leaf morphology.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 440. FNA vol. 17, p. 435.
Parent taxa Phrymaceae > Diplacus Phrymaceae > Diplacus
Sibling taxa
D. angustatus, D. aridus, D. aurantiacus, D. bicolor, D. bigelovii, D. bolanderi, D. brandegeei, D. brevipes, D. calycinus, D. cascadensis, D. clevelandii, D. clivicola, D. compactus, D. congdonii, D. constrictus, D. cusickii, D. cusickioides, D. deschutesensis, D. douglasii, D. fremontii, D. grandiflorus, D. graniticola, D. jepsonii, D. johnstonii, D. kelloggii, D. layneae, D. leptaleus, D. linearis, D. longiflorus, D. mephiticus, D. mohavensis, D. ovatus, D. parryi, D. parviflorus, D. pictus, D. pulchellus, D. puniceus, D. pygmaeus, D. rattanii, D. rupicola, D. rutilus, D. thompsonii, D. torreyi, D. traskiae, D. tricolor, D. vandenbergensis, D. viscidus
D. angustatus, D. aridus, D. aurantiacus, D. bicolor, D. bigelovii, D. bolanderi, D. brandegeei, D. brevipes, D. calycinus, D. cascadensis, D. clevelandii, D. clivicola, D. compactus, D. congdonii, D. constrictus, D. cusickii, D. cusickioides, D. deschutesensis, D. douglasii, D. fremontii, D. grandiflorus, D. graniticola, D. jepsonii, D. johnstonii, D. kelloggii, D. layneae, D. leptaleus, D. linearis, D. longiflorus, D. mephiticus, D. mohavensis, D. nanus, D. ovatus, D. parryi, D. parviflorus, D. pictus, D. pulchellus, D. puniceus, D. pygmaeus, D. rattanii, D. rupicola, D. rutilus, D. torreyi, D. traskiae, D. tricolor, D. vandenbergensis, D. viscidus
Synonyms Mimulus nanus, M. tolmiei
Name authority (Hooker & Arnott) G. L. Nesom: Phytoneuron 2012-39: 29. (2012) G. L. Nesom: Phytoneuron 2013-46: 1, figs. 2, 3. (2013)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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